I literally downloaded this app I start following my fertility I didn't change anything about myself...

I literally downloaded this app I start following my fertility I didn't change anything about myself or change anything I just not stressing it so hard and I ended up pregnant now I'm in a sad situation because my babies father cheats on me a lot and I recently found him with his girlfriend and now he's not claiming my baby ! But our baby was very much planned it sucks because I have no family support my family wants me to get an abortion his family just doesn't care at all